Block Buster for the Microvision handheld system is a Breakout clone in which you control a paddle that moves from side to side at the bottom of the playfield. You can choose from two paddle widths: Double and Triple. After pressing GO to serve a bouncing ball, your job is to keep the ball in play by rebounding it off of the paddle, effectively hitting it toward a three-layer wall of bricks at the top of the screen. Each time the ball hits a brick, the brick disappears. You score one point for bottom row bricks, two for middle row bricks, and three for top row bricks.
You can play Block Buster in either Slow or Fast mode. In Slow mode, the ball will accelerate to fast when it hits a top layer brick. In Fast mode, the ball remains at the same fast rate of speed the entire game. If you manage to knock out all of the bricks, another wall will appear. The game continues until you have let the ball get past your paddle 1, 3, 5, 7 or 9 times, depending on how many balls you chose at the beginning of the game.